Suppliers may change their prices in accordance with the terms and conditions set out in their general supply conditions.
With the exception of contracts that provide for other price adjustments (e.g. fixed-price contracts), your electricity or natural gas supplier can change the price of the energy supply at any time. Nevertheless, they are required to give you timely notice, and in any case 30 days’ notice, of their intention to change the supply price, either upwards or downwards. They are also obliged to inform you of your right to terminate the supply contract without notice and free of charge before the change comes into effect.
The right to terminate the contract does not apply to changes in other elements such as taxes or regulated tariffs for use of the network.